UY-1438 remove ++ notation from messages

Author: ppiernik

engine-api/src/main/resources/messages/engine-api/messages.properties

@@ -72,7 +72,7 @@ OutputTranslationMVELContextKey.authentications=List of authenticator ids used f
 OutputTranslationMVELContextKey.mfa=Set to true only if the current user was authenticated with two factors.
 OutputTranslationMVELContextKey.upstreamACRs=List with names of authentication context class references as obtained from upstream 1st factor IdP. Empty list if no ACR was obtained or the 1st factor was not using remote IdP.
 OutputTranslationMVELContextKey.upstreamIdP=Name of the upstream the 1st factor IdP or +null+ if the 1st factor was not using remote IdP.
-OutputTranslationMVELContextKey.upstreamProtocol=Name of the authentication protocol used for the first factor, one of: +saml+, +oidc+, +other+ or +local+.
+OutputTranslationMVELContextKey.upstreamProtocol=Name of the authentication protocol used for the first factor, one of: saml, oidc, other or local.
 
 DynamicPolicyConfigurationMVELContextKey.userOptIn=Boolean, true if user opted to use 2nd factor
 DynamicPolicyConfigurationMVELContextKey.hasValid2FCredential=Boolean, true if user has at least one valid credential, from the ones enabled in the hosting authentication flow
@@ -83,7 +83,7 @@ DynamicPolicyConfigurationMVELContextKey.idsByType=Map of identity values indexe
 DynamicPolicyConfigurationMVELContextKey.groups= List of all groups the user is a member.
 DynamicPolicyConfigurationMVELContextKey.upstreamACRs=List with names of authentication context class references as obtained from upstream 1st factor IdP. Empty list if no ACR was obtained or the 1st factor was not using remote IdP.
 DynamicPolicyConfigurationMVELContextKey.upstreamIdP=Name of the upstream the 1st factor IdP or +null+ if the 1st factor was not using remote IdP.
-DynamicPolicyConfigurationMVELContextKey.upstreamProtocol=Name of the authentication protocol used for the first factor, one of: +saml+, +oidc+, +other+ or +local+.
+DynamicPolicyConfigurationMVELContextKey.upstreamProtocol=Name of the authentication protocol used for the first factor, one of: saml, oidc, other or local.
 
 
 InputTranslationMVELContextKey.id=Value of the authenticated identity. If remote IdP returned multiple identities, then a random one is available, though this is a very exotic case.